Fan attachment for sewing machines



w. LABURDA.

FAN ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED APR, 18, I921.

1,427,827. I PatentedSept.

(BI wank Patented Sept. 5, 1922.

UNITED STATES WALTEB'LAQBURDA, .OLE COALT O.l\T,;O KL.AI-IOMA.

rain ATTACHMENT roasnvvnve MACHINES.

Application filed April 18, 1921. Serial N0. 462,15Q.

To all a homz't may concern Be it known that I l/VALTERLABmmA, citizen of Poland, residing at Coalton, in the countyof Okmulgee and State ofQkla-homa have invented certain new and useful Improvements in Fan Attachments for sew ing Machines, of which the following is a specification.

This invention relatesto a fan attachment for sewing machines, and it has for a general object to provide a means whereby a rotary fan maybe removably mounted on, and driven from, a sewing machine of ordinary type.

A further object is to provide a novel means for adjusting the angle of the fan on the sewing machine.

For further comprehension of the inven tion, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a face view of the fan in position on a sewing machine.

Fig. 2 is an end view thereof.

Fig. 3 is a plan view, with parts broken out into horizontal section.

Fig. 4 is an enlarged detail transverse section on the line 44 of Fig. 3.

According to the invention as here shown I provide an elongated supporting block 10 adapted to extend along and rest upon the head 11 of an ordinary sewing machine. To hold the block 10 in position on the head 11 it may have a suitable boring or socket in its underside into which projects the usual spindle 12 which ordinarily carries the spool from which the thread is fed to the needle of the sewing machine, the block 10 being provided with a lateral projection 13 on which is a spindle 14 on which the spool may be mounted as indicated at 15, when the fan is in position o the machine. The block 10 is also formed with a rearward extension 16 which has clownwardly extending fork 17 on the end thereof, which fork is adapted to straddle the main shaft 13 of the sewing machine.

Formed on the top of the block are a pair of bearing elements 20 in which is journaled a horizontal shaft 21 which projects at its rear end over the extension 16 and has fixed thereon a gear pinion 22 meshing withalarger gear 23, the latter being fixed on a second shaft 24 suitably supported by the block 10 and a bearing lug 25 on the extension 16. The rear end of this shaft 24 projects across the face of the usual flywheel 26 of the sewing machine and has fixed thereon a small friction wheel 27 adapted to engage the periphery of the flywheel.

Upon the forward end of the first mentioned shaft 21 is fixed a bevel gear 30 meshing with a likegear 31 on a third shaft 32 on which is fixed a fan 33, of the usual helical bladed type. The shaft 32 is suitably journaled in a hub 34 fixed on one endof arod 35 freely supported in a projection on the. block 10 in alinement with shaft 21, and adapted for rotary adjustment to vary the angle of shaft 32 with respect to the horizontal.

To permit of this adjustment of the rod 35 the outer face of the projection 36 is formed with a plurality of angularly spaced radial grooves 37, while the rod 35 has fixed thereto a transversely projecting pin 38 adapted to engage in either of these grooves. A coiled expansion spring 39 surrounds the inner end of rod 35 and bears against the hub 34 and normally holds the pin 38 in engagement with one of the grooves 37. Upon the outer end of the rod 35is fixed a head 40 for purposes of manipulation. The fan 33 is preferably enclosed in a suitable cage 41 fixed to the hub 34.

It is believed that the manner of use of my improved fan attachment will be readily undertsood from the above description. To place it in position it is only necessary to lower it onto the head 11 of the sewing machine, on which it rests freely. If it is desired to adjust the angle of the fan axis the rod35 is pulled outwardly against the action of spring39, moving the fan with it as will be understood, and then rotated until the pin 33 registers with the proper one of the grooves 37, and upon releasing the rod 35 the spring 39 moves the same inwardly, the pin engaging in the registering groove and locking the rod against turning. As the rod 35 and shaft 21 are in alinemena the angular adjustment of the rod, and in consequence of fan shaft 32, will not interfere with the proper engagement of the bevel gears 30 and 31.

Having thus described my invention what ters Patent of the desire to protect by 'Let- United States is as fol- 1 claim as new and lows:

1. An attachment for sewing machines comprising a rotary fan, a support for said fan, and driving means for said fan journaled in said support and including a friction wheel adapted to engage the fly-wheel of the sewing machine, and means for adjustably positioning said fan to vary its axis with respect to the horizontal, said means including a hub in which the fan is journaled, a rod at right angles to the fan axis having the said hub fixed to one end thereof, and a pin in said rod adapted to engage in any one of. a series of grooves formed in said support radial to said rod.

2. An attachment for sewing machines comprising a rotary fan, a support for said fan, said support having a socket in its underside and a downwardly projecting forked element at one end, whereby it may be freely supported on the sewing machine head.

3. An attachment for sewing machines comprising a rotary fan, a supporting block for said fan, a shaft journaled in said block means effecting a friction operating drive connection between the fly-wheel of the sewing machine and the said shaft, a fan shaft extending at right angles to said first shaft, a hub in which said fan shaft is journaled, gear connections between said shafts, alined with said first shaft and supported in said bearingblock, said rod having the said huh fixed to one end thereof, a transverse pin on said rod, said bearing block having a series of angularly spaced grooves extending radially to said rod, and a spring urging said rod to position with the said p'in engaging in one of said grooves.

In testimony whereof I have affixed my signature.

WALTER LABURDA.

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